Quote:
Originally Posted by NOLA_1906
The thing is we don't know all of the conditions that happened which caused his dyno reading. Was he truly at WOT when he saw the 15:1? He already admitted that all of his lights started flashing while it was on the dyno. It had never done that prior to him putting it on the dyno I bet. Who knows what the engine was doing after that.
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The 15.1 AFR was also confirmed by v8hunter using a wideband on the street at WOT.
http://www.tundrasolutions.com/forum...ip#post1107545
lawdog2k reports pinging which is a very strong indicator of a lean condition.
http://www.tundrasolutions.com/forum...ip#post1108079
Ryder276 has GTech results with before and after unichip readings. The chip was slower.
http://www.tundrasolutions.com/forum...ip#post1107050
socaliallstar82 lost both mph and ET with the unichip at the dragstrip.
Post your 1/4 and 1/8 mile track times!
I know there are a lot of "it feels faster" posts here but spending $600 on go-fast parts has a way of doing that. The hard data that's coming in does not look good.
15.1 AFR under load and certainly at WOT is not right. Not only is it dangerous for your engine, but it wreaks havoc on the catalytic converter and produces enormous amounts of NOx.
The engineers at Toyota wanted the truck to run rich at WOT. Probably because of the higher compression engine design they used. Going lean (leaner than stoich even!) on an already high compression engine is nuts.
Tell unichip to release the datalogs of their runs. They stated that their chip's tuning "is perfect". Tell them to back it up.